code: def create_and_test_config_with_num_labels(self):
      config = self.config_class(**self.inputs_dict, num_labels=5)
      self.parent.assertEqual(len(config.id2label), 5)
      self.parent.assertEqual(len(config.label2id), 5)
  
      config.num_labels = 3
      self.parent.assertEqual(len(config.id2label), 3)
      self.parent.assertEqual(len(config.label2id), 3)
  
file_path: transformers/tests/test_configuration_common.py
imports: import copy
  import json
  import os
  import tempfile
  from transformers import is_torch_available
  from .test_configuration_utils import config_common_kwargs
label_desc: Use image node_id 7 for calling the ConfigTester obj's underlying member method code with example usage: obj.create_and_test_config_with_num_labels() without return types